Antenna



FIG. 1 is a front elevation perspective view of an antenna showing our new design;

FIG. 2 is a first side elevation view of FIG. 1;

FIG. 3 is second side elevation view of FIG. 1;

FIG. 4 is third side elevation view of FIG. 1 ;

FIG. 5 is fourth side elevation view of FIG. 1;

FIG. 6 is a top plan view of FIG. 1;

FIG. 7 is a bottom plan view of FIG. 1;

FIG. 8 is a perspective view of the antenna, shown with parts separated for ease of disclosure; and,

FIG. 9 is a side view of the antenna, shown with parts separated for ease of disclosure.

The broken lines are shown for environmental purposes and form no part of the claimed design. 

The ornamental design for an antenna, as shown and described. 